I don’t know Simon Harris, but this video is well done, and I thank him for it. The article of mine from which Harris reads in this video is here; sometimes it’s a bit difficult to tell whether he is quoting Ebner or me, so you can refer to that for reference.
Meanwhile, I have repeatedly asked Julia Ebner and Maajid Nawaz of Quilliam for a retraction and apology. They have ignored my repeated requests, not even deigning to give me the courtesy of a reply.